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Sentence
Span Details
大漢和辞典
Dai Kanwa Jitennoun
は
topic markergrammar
漢字
kanji; Chinese characternoun
研究
research; study; investigationnoun, suru verb
に
direction, time, indirect object, or target markergrammar
欠かせない
indispensable; essential; vital; crucialexpression, i-adjective
辞書
dictionary; lexicon; letter of resignationnoun
だ。
plain copulagrammar